Question

i want to reverse 3 digit number by using if-else-if statement?In C++.

Answer 1

// This is a function which reverses any number regardless of amount of digits

int reverse(int number) {
    if (number < 0) {
        return (-reverse(-number));
    }
    int res = 0;
    while (number > 0) {
        res = (res * 10) + (number % 10);
        number = number / 10;
    }
    return res;
}

// This statement reverses a 3 digit number
// works ONLY for 3 digit number

int reverse = number - (number % 10) - 100 * (number / 100) + 100 * (number % 10) + (number / 100);

// Why do you need an if-else statement??